In situ observation of fracture process of a TiAl alloy with fully lamellar microstructure

Journal Article · Mon May 15 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00239-R· OSTI ID:69648

Jin, C; Wang, J; Chen, W ^[1]

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1. Shanghai Univ. (China). Inst. of Metallurgy and Materials

The objective of this paper is to present the results of an in situ observation of crack growth and the fracture process in a TiAl alloy with the fully lamellar microstructure. The fracture process of a TiAl alloy with a fully lamellar microstructure allows the formation of bridging and shear ligaments resulting in a relatively high toughness. The formation of the ligaments, which experience extensive deformation between the crack faces as the crack extends, appears to be attributable to the ability of the lamellae to locally deform. However, the plastic incompatibility strains are still obvious. Further research is needed to understand the mechanism on the concurrent plastic incompatibility and local ductility in the fully lamellar microstructure.

• OSTI ID: 69648
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 10 Vol. 32; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ANNEALING
CASTING
CHROMIUM ALLOYS
CRACK PROPAGATION
CRACKS
DUCTILITY
FORGING
FRACTURE PROPERTIES
INTERMETALLIC COMPOUNDS
LAMELLAE
MICROSTRUCTURE
NEODYMIUM ADDITIONS
SAMPLE PREPARATION
SILICON ADDITIONS
TITANIUM ALLOYS